A2.5-cm-diameter horizontal water jet with a speed of vj = 40 m/s relative to the ground is deflected by a 60°stationary cone whose base diameter is 25 cm. water velocity along the cone varies linearly from zero at the cone surface to the incoming jet speed of 40 m/s at the free surface. disregarding the effect of gravity and the shear forces, determine the horizontal force f needed to hold the cone stationary